Answer:
I can be as thin as a picture frame but my insides have many things you can see.
I am the red tongue of the earth, that buries cities.
What is between heaven and earth?
What is an acceptable act of violence during saint Patrick's day?
They are toothy nocturnal immortals.
What language does a billboard speak?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?